canvas {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, .2);
}
#show_name {
    z-index: 1;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%);
    background-image: -webkit-linear-gradient(left, blue, #66ffff 10%, #cc00ff 20%, #CC00CC 30%, #CCCCFF 40%, #00FFFF 50%, #CCCCFF 60%, #CC00CC 70%, #CC00FF 80%, #66FFFF 90%, blue 100%);
    /*background-image: -webkit-linear-gradient(left, #e50dff, #7bfff7 10%, #ff1d46 20%, #515fcc 30%, #CCCCFF 40%, #00FFFF 50%, #CCCCFF 60%, #CC00CC 70%, #CC00FF 80%, #66FFFF 90%, blue 100%);*/
    -webkit-text-fill-color: transparent;
    -webkit-background-clip: text;
    -webkit-background-size: 200% 100%;
    -webkit-animation: masked-animation 4s linear infinite;
    font-size: 35px;
    font-family: Microsoft YaHei;
}
@keyframes masked-animation {
    0% {
        background-position: 0 0;
    }
    100% {
        background-position: -100% 0;
    }
}
